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From: keith@cecil.UUCP
Newsgroups: net.lang.c++
Subject: Is this a C++ bug?
Message-ID: <58@cecil.UUCP>
Date: Fri, 7-Mar-86 15:11:24 EST
Article-I.D.: cecil.58
Posted: Fri Mar  7 15:11:24 1986
Date-Received: Sun, 9-Mar-86 08:46:16 EST
Organization: NIH-CSL, Bethesda, MD
Lines: 29

A member of a const argument cannot be used as a const argument in a
function call:

class Foo { int i; };

class Bar {
	Foo foo;
public:
	void g(const Foo&);
	void f(const Bar& b)	{ g(b.foo); }	// gets error
};

"constbug.c", line 7: error: address of member Bar::foo of const Bar 

Is this a bug in C++ Release 1.0 or a "feature"?

Incidentally, you can get around this with an explicit cast:

	{ g(((Bar*)&b)->foo); }

-- 
---
	Keith Gorlen
	Computer Systems Laboratory
	Division of Computer Research and Technology
	National Institutes of Health
	Bethesda, MD 20892
	phone:	(301) 496-5363
	uucp:	{decvax!}seismo!elsie!cecil!keith